Collection I comprises the following: (i) Rhiwgoch estate and other property in cos Mer. and Denb., comprising property in p's Trawsfynydd, Dolgellau, Llanfair-juxta-Harlech, Llandderfel, Llandrillo-yn-Edeirnion and [Llanfor] (t. Betws), co. Mer., and in p. [Llanfihangel Glyn Myfyr] (t. Llysan), co. Denb.; (ii) Glascoed, Llanforda, Plas-y-ward B (co. Mer.), comprising property in p's [Llanymawddwy] (t. Cywarch), [Llanuwchllyn] (t. Cynllwyd), [Llandderfel] (t's Betws y Coed, Nanffreuer), [Llanycil] (t's Ismynydd, Streflyn), and [Llandrillo] (t. Y Faerdref), all co. Mer.; (iii) Manor of Valle Crucis, comprising property in p. Llanfrothen, co. Mer. Prior to its being incorporated in the Valle Crucis collection this property was in the Glasinfryn collection; (iv) Llwydiarth estate (Llanfair collection), comprising property in p. Mallwyd, co. Mer.; (v) Glan-llyn estate, comprising property in p's Llanuwchllyn, Llanycil, Corwen, Llangywer, Llanfor, co. Mer.; (vi) The 1768 purchased estate, comprising property in p. Llanuwchllyn, co. Mer., and p. Llangedwyn, co. Denb.; (vii) Llwydiarth estate (Llangedwyn collection), comprising property in p's Llangedwyn (t. Sgrwgan), Llanrhaeadr-ym-Mochnant (t. Gartheryr), co. Denb.; (viii) Llwydiarth estate (Mochnant collectio), comprising property in p's Llanrhaeadr-ym-Mochnant (t's Nantfyllon, Brithdir, Llanhafon), Llanfechain, Llansanffraid, Hirnant (t. Cwm y Fedw), Pennant Melangell (t. Cornorion), co. Mont.; (ix) Glascoed, Llanforda, Plas-y-ward B (co. Mont.), comprising property in p's Llanrhaeadr-ym-Mochnant (t's Cefn Coch, Brithdir, Abermarchnant, Llanhafon), Hirnant, Llanfyllin, Llansanffraid-ym-Mechain, all co. Mont). Collectors: Thomas Jones, 1772-1784, Randle Jones, 1785, William Griffith, 1787-1801, William Williams, Griffith Richards, 1786-1787, 1790-1791, 1794-1809, Griffith Roberts, 1785-1789, Robert Baugh, 1791-1792, Jonathan Barff, 1792-1794, John Evans, 1792-1793, Walter Jones, 1785-1791, Dr Samuel Lovatt, 1808.